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Doubles and Halves Trick Worksheet

Maths tricks trick 5: Doubles and halves game · Set 512 · 40 questions
TalentJR

The trick (Split and double): Split the number into tens and ones: 37 = 30 + 7. Double each part (30 → 60, 7 → 14) — or halve each part. Add the two answers: 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.Double 88 =
  2. 2.Double 28 =
  3. 3.Half of 28 =
  4. 4.Double 87 =
  5. 5.Half of 82 =
  6. 6.Double 66 =
  7. 7.Double 67 =
  8. 8.Double 81 =
  9. 9.Half of 106 =
  10. 10.Double 99 =
  11. 11.Double 24 =
  12. 12.Half of 166 =
  13. 13.Half of 16 =
  14. 14.Double 63 =
  15. 15.Double 72 =
  16. 16.Half of 102 =
  17. 17.Half of 172 =
  18. 18.Double 22 =
  19. 19.Double 92 =
  20. 20.Double 77 =
  21. 21.Double 64 =
  22. 22.Half of 84 =
  23. 23.Half of 122 =
  24. 24.Half of 64 =
  25. 25.Double 95 =
  26. 26.Half of 52 =
  27. 27.Half of 112 =
  28. 28.Half of 164 =
  29. 29.Double 42 =
  30. 30.Double 31 =
  31. 31.Double 23 =
  32. 32.Half of 58 =
  33. 33.Half of 182 =
  34. 34.Double 17 =
  35. 35.Half of 22 =
  36. 36.Double 49 =
  37. 37.Double 48 =
  38. 38.Half of 62 =
  39. 39.Double 82 =
  40. 40.Half of 34 =

Answer key

  1. 176
  2. 56
  3. 14
  4. 174
  5. 41
  6. 132
  7. 134
  8. 162
  9. 53
  10. 198
  11. 48
  12. 83
  13. 8
  14. 126
  15. 144
  16. 51
  17. 86
  18. 44
  19. 184
  20. 154
  21. 128
  22. 42
  23. 61
  24. 32
  25. 190
  26. 26
  27. 56
  28. 82
  29. 84
  30. 62
  31. 46
  32. 29
  33. 91
  34. 34
  35. 11
  36. 98
  37. 96
  38. 31
  39. 164
  40. 17

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